Memory Game The Endocrine SystemOnline version Review the organs of the endocrine system and their functions. by Kathy Dilliplane Produces melatonin to regulate sleep cycles Helps the immune system recognize and fight pathogens Regulate the male reproductive system Thyroid Regulates growth and metabolism Increase heart rate during a "Fight or Flight" response Thymus Regulates the female reproductive system Pineal Gland Parathyroid Glands Adrenal Glands Regulates blood sugar levels Testes The body's "Master Gland" that controls the other endocrine organs. Regulates calcium levels in the blood. Pituitary Ovaries Pancreas